I'm totally new to ExtJS and I start working with Sencha designer 2.0 as it uses MVC and is really helpful to design screen.
Unfortunatelly there are some operation that I don't know how to do.

Here there are :
1 - I'd like to do drag and drop between treeview's element and a chart. Both treeview and chart use a different store but there is an identifier common field. With sencha designer I found the drag drop plugin for treeview but it don't seems to have a drag drop option available for the chart what can I do to enable drop on the chart ?
The treeview json

2 - I also wanted to add a drilldown possibility in the chart. How can I do that ?

3 - I was trying to make a relation between two stores (the treeview store and the chart store) but I don't understand the mecanics behind that. What I want to do is to use the relation between two stores so I can get the lib field that come from the second store to put in the label of the axis chart wich use the first store.

Perhaps the better answer is to start by the beginning and learn ExtJS from "scratch" without the designer (I'm interested in great tuto) but we actually haven't lot's of time to do that work so we decided to use the designer.

I hope domeone could help me at least with good tuto and advices on how to well designed all ExtJS elements.